Malicious PDF — malware analysis report

Static analysis result for SHA-256 29ac6d167dbe060a…

MALICIOUS

PDF

69.6 KB Created: 2021-02-22 01:08:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 273003053cbe2a678d8ef57973c1eade SHA-1: c985619c3d30815065b5343492b3408736342bb2 SHA-256: 29ac6d167dbe060a7e8984bef976e822bd6a8688299f096baf05cf91aef80096
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://druttle.ru/wix?keyword=virtual+cow+eye+dissection+worksheet+answers PDF link annotation
    • http://casser.xyz/mawoledadiwulomitutapukibxuy54.pdfIn PDF document text
    • https://tevupiju.weebly.com/uploads/1/3/4/8/134865653/xoremolegufupolevo.pdfIn PDF document text
    • http://betmoy56.com/527337940863i2gd.pdfIn PDF document text
    • http://formverifiedbadge.com/how_to_make_fondue_in_crock_pottfkv2.pdfIn PDF document text
    • http://1fps.ru/dish_anywhere_app_for_laptopt38gi.pdfIn PDF document text
    • http://fb-ig-copyright.com/dazalutifapinobunifizupo8vho6.pdfIn PDF document text
    • http://ruwegekugite.22web.org/google_drive_default_folder_android.pdfIn PDF document text
    • http://strgb2.ru/accuracy_and_precision_worksheet_freev9k9w.pdfIn PDF document text
    • http://usese.xyz/formalits_vente_d_un_fonds_de_commerce4koag.pdfIn PDF document text
    • http://paganel.world/69620702607nvhm1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://teworubinogo.epizy.com/nikulofarufojobodol.pdfIn PDF document text
    • https://s3.amazonaws.com/pasawexawinogad/venapokaxikegixur.pdfIn PDF document text
    • http://fumesowira.epizy.com/beetv_2._1._2_mod_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/suxuzubojut/aguri_skyway_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/vabedafozo/lagu_yang_terdalam_versi_reggae_ska.pdfIn PDF document text
    • https://s3.amazonaws.com/satulibaren/gozavivimakuvela.pdfIn PDF document text
    • https://s3.amazonaws.com/mujevubutukoxu/ielts_reading_band_descriptors_public_version.pdfIn PDF document text
    • https://s3.amazonaws.com/kizugokofo/bibliografia_apa_libro.pdfIn PDF document text
    • https://s3.amazonaws.com/mogedozara/black_desert_online_mobile.pdfIn PDF document text
    • https://s3.amazonaws.com/liwafo/16398064240.pdfIn PDF document text
    • https://s3.amazonaws.com/zesotat/confidentiality_agreement_template_nsw.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d45d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD45D 5252 bytes
SHA-256: e60f46e5d57e7727d0208f9a127f1943f41e756bcb3c6130e1fdcd3e7d21082c
font_01_sfnt_off0000e649.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE649 9992 bytes
SHA-256: e7b007444b288f6fb44ad621830074fce58421c48ffc6cef6e0832e820b65771